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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Holdenia
Taxonomy
Holdenia was named by Cooper (1953). Its type is Holdenia typa.
It was assigned to Isocolidae by Whittington (1956), Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Isocolidae by Whittington (1956), Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
H. typa (type species)
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Holdenia Cooper |
| 1956 | Holdenia Whittington |
| 2002 | Holdenia Jell and Adrain p. 384 |
| 2002 | Holdenia Sepkoski |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Whittington et al. 1997 | |||||
Age range: base of the Ashbyan to the top of the Kralodvorian or 457.30000 to 445.20000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sandbian | USA (Virginia) | H. sp. (178247) | |
| Ashbyan | USA (Virginia) | H. typa (164296) | |
| Blackriveran | USA (Virginia) | H. typa (164297) | |
| Kralodvorian | Spain (Zaragoza) | H. sp. (21057) | |
| Ashgill | Spain (Aragon) | H. insculpta (80725) |